Unit 1 Vocabulary Practice

Edit Answers
12345678910
Across
  1. 4. Electrons located on the outermost energy level of an atom.
  2. 8. Region of the atom where electrons live.
  3. 9. Subatomic particle that has a neutral charge and is located in the nucleus.
  4. 10. Subatomic particle that has a positive charge and is located in the nucleus.
Down
  1. 1. Region of the atom where protons and neutrons live.
  2. 2. Number that tells you the numbers of protons and the numbers of electrons in an atom.
  3. 3. Subatomic particle that has a negative charge and is located in the electron cloud.
  4. 5. Number that tells you the combined number of protons and neutrons in an atom.
  5. 6. Columns on the periodic table. This number helps you find the number of valence electrons in an atom.
  6. 7. Rows on the periodic table. This number tells you how many energy levels there are in the atom.